基于视觉图像的典型舞蹈拉伸动作识别方法

面对典型舞蹈拉伸动作识别的复杂性,研究基于视觉图像的典型舞蹈拉伸动作识别方法。通过视觉图像相机采集典型舞蹈拉伸动作图像,采用平均值法将采集典型舞蹈拉伸动作图像转化为灰度图像,并经阈值化处理转化为二值图像后,利用高斯模型减除二值化图像背景,利用中值滤波法去除图像中的噪声;利用改进可变形部件模型算法和卷积神经网络算法识别典型舞蹈拉伸动作。实验结果表明,用该方法预处理后的典型舞蹈拉伸动作图像画质清晰度高,该方法可有效识别不同类型的舞蹈训练动作,其中拉伸动作识别准确率可达93%。

基于典型舞蹈拉伸动作的紧身运动裤结构设计与评价

针对市场上常见紧身运动裤在舞蹈运动中缺乏良好的舒适性以及美观性的问题,根据舞蹈拉伸动作时皮肤形变率规律,通过对紧身运动裤样版的前后裤片、后腰片以及裤脚内侧加放松量,选取四面弹面料(锦纶/氨纶82/18),使用薄膜压力传感器测量前中腰、臀部后侧最突出点及膝盖前侧弯曲最突出点的压力值,并结合5级心理量表进行评价,优化得到适合舞蹈运动的紧身运动裤。

Application of dynamic analysis of strength reduction in the slope engineering under earthquake

At present,the methods of analyzing the stability of slope under earthquake are not accurate and reasonable because of some limitations. Based on the real dynamic tensile-shear failure mechanism of slope,the paper proposes dynamic analysis of strength reduction FEM (finite element method) and takes the reduction of shear strength parameters and tensile strength parameters into consideration. And it comprehensively takes the transfixion of the failure surface,the non-convergence of calculation and mutation of displacement as the criterion of dynamic instability and failure of the slope. The strength reduction factor under limit state is regarded as the dynamic safety factor of the slope under earthquake effect and its advantages are introduced. Finally,the method is applied in the seismic design of anchors supporting and anti-slide pile supporting of the slope. Calculation examples show that the application of dynamic analysis of strength reduction is feasible in the seismic design of slope engineering,which can consider dynamic interaction of supporting structure and rock-soil mass. Owing to its preciseness and great advantages,it is a new method in the seismic design of slope supporting.

冬季网球的伸展练习

天气凉,身体发僵,动作不灵活,稍不留心便容易扭伤、拉伤。所以,冬季打网球,务必做好准备活动,尤其要注重肌肉、韧带的拉伸,这是防止运动伤害的有效措施。